Association between menstrual cycle pattern regularity and changes in menstrual bleeding following COVID-19 vaccination: secondary analysis of an observational study

Abstract

COVID-19 vaccination is associated with small, temporary increases in menstrual cycle length and bleeding volume among individuals with regular cycles prior to vaccination. However, post-vaccination menstrual disturbances among individuals with irregular cycles, who make up approximately one quarter of the menstruating population, have only been examined using cross-sectional retrospective reporting. This study used prospectively collected data to determine whether post-COVID-19 vaccination changes in menstrual bleeding volume and menses length differ by pre-vaccination cycle regularity patterns.

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This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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DOI

https://doi.org/10.1136/bmjsrh-2024-202564

Repository URI

https://www.research.ed.ac.uk/en/publications/67a8a815-7155-42b5-a7b7-e1745306811b